1. Chapter 3 lessons 3,4,and 5

2. Reading Quiz Please take out a sheet of paper and a pen or pencil.
Write you name on the top and number 1-5

3. 1) Name two methods/ characteristics geologist use to classify rocks

4. 2) Name one type of rock classification that was mentioned in the reading.

5. 3) Are igneous rocks formed from magma, pressure, or layering of materials?

6. 4) Some rocks can be made by compacting remains and shells of once living things. True or False.

7. 5) I did my homework this weekend and read the assigned pages
5) I did my homework this weekend and read the assigned pages. True or False.

8. Warm-up
Turn your reading quiz over and answer the warm-up questions to the best of your ability.
Fill in the blank: As you travel into the center of the earth depth increases, as well as ________ and _____________.
Do you think that all rocks are the same? Yes no and explain your answer.
What do you think happens to solid rock and metals as they are pushed deeper indie the earth?

9. How Geologist classify rocks
Mineral composition
Color:
comes from about 20 different rock forming minerals.
The different mineral ratios account for the variety of rock colors

10. Classifying continued
Texture: how the rock feels. Comes from grains (minerals and other rocks)
Fine grain (small), coarse grain (large), or no visible grain (cannot see).
Round grain or jagged grain
Nonbanded (no pattern) or banded (visible pattern layers or swirls).

11. Classifying continued
Origin
Igneous rock: forms from the cooling of molten rock called magma. Can occur inside or outside of the earths crust.
Sedimentary rock: occurs when rocks, animal and plant remains are cemented and pressed together.
Metamorphic rock: Rock that forms from changes because of intense heat, pressure, and chemical reactions.

12. Igneous Rocks
Origin: Extrusive (formed from cooling lava on the earths surface) or Intrusive (formed from cooling magma inside of the earth)
Texture: rapid cooling extrusive forms fine grained rock texture or glassy ; slow cooling intrusive forms coarse grained rock.

13. Igneous Rocks
Mineral composition: Lava has a low silica content so its dark in color (Basalt). Magma is high in silica content so it is light in color (granite).
Used for building because igneous rocks are hard dense and durable.

15. Metamorphic rocks
Origin: rocks formed from other rocks after they are changed due to intense pressure, heat, or both. Changes in mineral composition, appearance, structure.
Classified
Foliated: rocks are flattened by pressure into visible parallel layers (gnesis)
Nonfoliated: no visible layers (marble)
Used in architecture and sculpture

17. Label which type of rock is being represented in each diagram.
Warm-up
Sketch each diagram.
Label which type of rock is being
represented in each diagram.

18. Sedimentary Rocks
Origin: Formed when sediment is gathered and compacted in a multistep process.
Erosion & weathering: erosion-breaking down of rock through running water, wind, or ice. Weathering-acid rain, ice thawing and freezing, and roots also break down rock
Deposition: pieces of rock settle to on the bottom of the ocean, lake, or river floor.
Compaction: the weight of new layers on top of the last compact the sediment.
Cementation: dissolved minerals and crystals glue the sediment together.

20. Sedimentary Rocks Types of sedimentary rocks
Clastic rocks: made from other rocks big or small pressed together. ( conglomerate, breccia, sandstone, shale)
Organic rocks: made from dead things that fall to the bottom of a body of water, lay there with more and more depositing on top of them, over millions of years they slowly become rock such as coal and limestone.
Chemical rocks: chemicals that are dissolved in water are deposited over time.

21. Sedimentary Rocks Used for building and tools.
Sedimentary rocks are easy to cut into and manipulate making it easy to use and shape.

23. THE ROCK CYCLE
Forces deep inside Earth and at the surface produce a slow cycle that builds, destroys, and changes the rocks in the crust.
This cycle is called the rock cycle: forces on the crust and mantle that change the rocks from one form to another.

24. READ PAGE 127
Where was the Granite that made up the mountain first formed? Which type of rock came first? It’s kind of like which came first, the chicken or the egg?

25. Fill out the rock cycle diagram. Melting Melting Heat and Pressure
Sedimentary rock
W & E
Weathering and erosion
Page 128.
Fill out the rock cycle diagram.
Melting
Melting
Heat and Pressure
Igneous Rock
Metamorphic Rock